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MEIG SLM336 Hardware Design Manual

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SLM336 Hardware Design Manual
SLM336 Hardware
Design Manual
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V1.02
Released date: 2023/02
SLM336
Hardware Design Manual
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Summary of Contents for MEIG SLM336

  • Page 1 SLM336 Hardware Design Manual SLM336 Hardware Design Manual Version Number V1.02 Released date: 2023/02 SLM336 Hardware Design Manual 0 / 1...

  • Page 2: Important Notice

    COPYRIGHT NOTICE Copyright © MeiG Smart Technology Co., Ltd. All rights reserved. All contents of this manual are exclusively owned by MeiG Smart Technology Co., Ltd (MeiG Smart for short), which is under the protection of Chineselawsandcopyrightlaws in international conventions.

  • Page 3: Revision History

    SLM336 Hardware Design Manual Revision History Version Time Author Reasons for revision number Hardware V1.00 2023-01 Initial establishment Department modify some AT commands and delete Hardware V1.01 2023-02 some short message storage related Department content; Modify GSM characteristics Hardware Modify package description and sim card V1.02...

  • Page 4: Table Of Contents

    SLM336 Hardware Design Manual Content 1 Introduction ............................. 5 1.1 Safety Instruction ............................6 1.2 Documentation Purposes ........................7 1.3 Content ............................... 7 2 Product Overview ........................... 8 2.1 Basic Description ............................8 2.2 Main Performance ............................ 8 2.3 Functional Block Diagram........................10 2.4 Evaluation Board .............................
  • Page 5 SLM336 Hardware Design Manual 4.3.5 OTA Antenna Requirements ...................... 47 5 Electrical Characteristics ........................48 5.1 Limited Voltage Range ........................... 48 5.2 Ambient Temperature Range........................ 48 5.3 Electrical Characteristics of Interface Working State ................ 49 5.4 Power Consumption Range ........................49 6 Mechanical Characteristics .........................

  • Page 6: Introduction

    ⚫ GSM: 85.6kbps/85.6kbps; ⚫ TDD-LTE: 8Mbps/2Mbps； ⚫ FDD-LTE:10Mbps/5Mbps； Except wireless data access, SLM336 can be widely used in M2M field, such as OTT, CPE, router, data card, tablet computer, security and industrial PDA. SLM336 Hardware Design Manual 5 / 79...

  • Page 7: Safety Instruction

    SLM336 Hardware Design Manual 1.1 Safety Instruction By following the following safety principles, you can ensure personal safety and help protect products and the working environment from potential damage: Driving safety first! When you drive, do not use the handheld mobile terminal device unless it has hands-free function.

  • Page 8: Documentation Purposes

    This article elaborates the basic functions, main features, hardware interface and its use method, structural characteristics, power consumption index and electrical characteristics of SLM336 wireless module in detail, and guides users to apply SLM336 module to various application terminals. Content This document is divided into the following parts: ⚫...

  • Page 9: Product Overview

    SLM336 Hardware Design Manual 2 Product Overview 2.1 Basic Description SLM336 is a wireless communication module that supports GSM /TDD-LTE/FDD-LTE, and can provide voice (PCM) and analog voice SMS for customers. Table 1 SLM336 module support frequency band Internet SLM336...
  • Page 10 SLM336 Hardware Design Manual ⚫ Maximum 4 RX slots per frame ⚫ Network protocol characteristics TCPIP/UDP/HTTP(S)/MQTT/FTP/SSL/OneNet ⚫ Text and PDU mode ⚫ point-to-point MO and MT Short message service（SMS） ⚫ Short message storage ⚫ Cell broadcast ⚫ USIM port Support USIM/SIM: 1.8V &...

  • Page 11: Functional Block Diagram

    ⚫ ADC port ⚫ I2C port ⚫ SPI port ⚫ USB_BOOT port Functional Block Diagram The following is the block diagram of SLM336, illustrating its main functions. ⚫ ⚫ ⚫ Internal memory ⚫ The RF part ⚫ Peripheral interface ANT_MAIN ANT_WIFI/BT...

  • Page 12: Evaluation Board

    SLM336 Hardware Design Manual Evaluation Board For testing and use of SLM336, MeiG provides a set of evaluation board, including USB cables, antennas, and other peripherals. Please refer to the “SLM336_USB_ZB User Manual” for the specific usage of the evaluation board.

  • Page 13: Application Interface

    SLM336 Hardware Design Manual 3 Application Interface Basic Description SLM336 adopts 126 pin LGA, providing the following functional interfaces: ⚫ Power supply ⚫ USB2.0 High-Speed interface ⚫ UART port ⚫ USIM/SIM port（support 3V, 1.8V, The hot plug function of sim2 is under development.）...

  • Page 14: Lcc Card Pin Definition

    SLM336 Hardware Design Manual 3.2 LCC Card Pin Definition PSM_IND RESERVED ADC1 RESER RESER RESER RESER USIM1_GND PCM_CLK USIM1_CLK RESER RESER RESER RESER RESER PCM_SYNC USIM1_DATA RESER USIM2 RESER RESER PCM_DIN USIM1_RST _DET USIM1_VDD PCM_DOUT SPI_D USIM2 MIC_ RESER MIC_P...

  • Page 15: Pin Description

    SLM336 Hardware Design Manual The following table shows the definition of each pin in the SLM336 module. Table 3 IO parameter definitions Type Description Input/Output Digital input signal. Digital output signal. Open drain output signal. Analog input Bidirectional open drain output signal...
  • Page 16 SLM336 Hardware Design Manual clock signal Only slave VILnom=0V PCM_CLK Leave empty if not mode is VIHnom=1.8V used supported frame signal Only slave VILnom=0V synchronization PCM_SYNC mode is VIHnom=1.8V Leave empty if not supported used data input Only slave VILnom=0V...
  • Page 17 SLM336 Hardware Design Manual RESERVED RESERVED VILnom=0V Module reset RESET_N VIHnom= VBAT Active at low level Flight mode VILnom=0V control W_DISABLE# VIHnom=1.8V Leave empty if not used Application processor sleep VILnom=0V AP_READY state detection VIHnom=1.8V Leave empty if not used...
  • Page 18 SLM336 Hardware Design Manual AUX_UART VOLnom=0V AUX_TXD Leave empty if not VOHnom=1.8V used AUX_UART VILnom=0V AUX_RXD Leave empty if not VIHnom=1.8V used Digital level, 1.8V output, 50mA load VDD_EXT 1.8V capacity Leave empty if not used The main serial data terminal is...
  • Page 19 SLM336 Hardware Design Manual Main UART output VOLnom=0V carrier detection MAIN_DCD VOHnom=1.8V Leave empty if not used Main serial port output ringing VILnom=0V MAIN_RI prompt VIHnom=1.8V Leave empty if not used When use, needs I2C serial clock externally VOLnom=0V I2C_SCL...
  • Page 20 SLM336 Hardware Design Manual USIM1_GND (U)SIM1 GND RESERVED RESERVED RESERVED RESERVED Vmax=4.2 VBAT_RF Vmin=3.5V Module RF power Vnorm=3.8V Vmax=4.2 VBAT_RF Vmin=3.5V Module RF power Vnorm=3.8V Bluetooth and cannot use Wi-Fi Scan Bluetooth ANT_BT/WIFI_SCA VILnom=0V Common antenna and Wi-Fi VIHnom=1.8V interface...
  • Page 21 SLM336 Hardware Design Manual Main antenna ANT_MAIN interface RESERVED RESERVED Main mode Only main VOLnom=0V output SPI_DOUT mode is VOHnom=1.8V Leave empty if not supported used RESERVED RESERVED RESERVED RESERVED 67~74 Do not pull Emergency VILnom=0V up before USB_BOOT download mode VIHnom=1.8V...
  • Page 22 SLM336 Hardware Design Manual Universal radio frequency control VOLnom=0V GRFC2 VOHnom=1.8V Leave empty if not used RESERVED RESERVED 79~82 (U)SIM2Hot swap detection signal the software turns VILnom=0V USIM2_DET* off the detection VIHnom=1.8V function by default Leave empty if not used...
  • Page 23 The above interface functions are not supported at the same time, some pins are multiplexed functions, please pay attention when selecting. 3. SLM336 pin multiplexing is presented in the document “SLM336_GPIO Function Multiplexing” SLM336 Hardware Design Manual 22 / 79...

  • Page 24: Power

    VBAT_BB and VBAT_RF. 3.4.2 Reduce Voltage Drop SLM336 power supply range of 3.5 V ~ 4.2 V. During data transmission or calls, instantaneous high-power transmission will form a current peak value of up to 2A, which will cause large ripples in VBAT.

  • Page 25: Power Supply Reference Circuit

    The design of the module power supply is very important, because the performance of the module depends largely on the power supply. The SLM336 must select a power source that provides at least 2A current capability. If the voltage difference between the input voltage and the module supply voltage is not very large, it is recommended to choose LDO as the supply.

  • Page 26: Vdd_Ext Voltage Output

    3.4.4 VDD_EXT Voltage Output When SLM336 normally boot, the voltage of output Pin29 is 1.8v as well as current load is 50mA. This output voltage can be used as an external pull-up source, such as a level reference, and the Pin status can be detected whether the module power on or not.
  • Page 27 SLM336 Hardware Design Manual PWRKEY 4.7K Turn on pulse FIG. 6 Open set drive reference boot circuit Another way to control the PWRKEY pin is through a switch button. A TVS is placed near the button for ESD protection. The reference circuit shows below:...

  • Page 28: Shutdown

    Reset There are two SLM336 reset modes: hardware reset and AT command reset. 3.6.1 Hardware Reset When the module is working, lower the RESET_N pin by at least 150ms to reset the module.

  • Page 29: At Command Reset

    ≤0.3V Figure 11 RESET_N reset sequence diagram 3.6.2 AT Command Reset Through SLM336 UART or USB AT port, enter AT+TRB command, make SLM336 reset and restart. 3.7 USIM/SIM Port SLM336 supports 1.8V and 3.0V USIM/SIM CARDS. SLM336 Hardware Design Manual...
  • Page 30 (U)SIM2 Hot swap detection signal SLM336 supports USIM/SIM card hot-plugging function through USIM_DET pin and supports low level detection. After USIM/SIM card is inserted in the figure, USIM_DET pin is at low level. When USIM_DET pin is at high level, no card is detected.
  • Page 31 SLM336 Hardware Design Manual AT Command Function Description AT+GTSET=1 High level detection AT+GTSET=0 Default, low level detection The circuit design shows in the follow figure, with USIM/SIM card hot swap function. VDD_EXT USIM1_VDD USIM1_GND USIM CARD CONNECTOR 100nF USIM1_VDD USIM1_RST...

  • Page 32: Usb Interface

    3.8 USB Interface The SLM336 provides a USB interface conforming to the USB 2.0 standard. This interface is used for AT command interaction, data transfer, software debugging and version upgrading, etc. 3.8.1 USB Pin Description The SLM336 module provides a USB2.0 interface.

  • Page 33: Usb Reference Circuit

    SLM336 Hardware Design Manual 3.8.2 USB Reference Circuit The SLM336 module USB interface application reference circuit is shown in the figure below. Module Test Points ESD Array USB_DM USB_DM USB_DP USB_DP USB_VBUS USB_VBUS Figure 14. Refer to the design of the USB interface In order to meet the signal integrity requirement of USB data line, R1/R2/R3/R4 resistors must be placed close to the module and between resistors close to each other.

  • Page 34: Serial Port

    SLM336 Hardware Design Manual 3.9 Serial Port SLM336 module has three serial ports: main serial port MAIN_UART, AUX_UART, DEBUG UART. The main features of the main serial port MAIN_UART, AUX_UART, DEBUG UART are described below. ⚫ The main serial port supports 4800Bps, 9600bps, 19200Bps, 38400Bps, 57600bps, 115200Bps, 230400bps, 460800bps, 92160bps baud rate.
  • Page 35 -0.3 0.45 1.35 The serial port level of SLM336 module is 1.8V. If the client host is 3.3V, the level converter needs to be added in the serial port application. TXB0104PWR of TI is recommended. The following picture is a...

  • Page 36: Status Indication

    3.10 Status Indication The status indicator pin is mainly used to drive network status indicator light. SLM336 module has NET_STATUS and STATUS two network STATUS pins. The following two tables describe the pin definition and logic level changes in different network states.

  • Page 37: Low Power Mode

    SLM336 Hardware Design Manual The reference circuit is shown in the figure below: V_BAT 2.2K 4.7K NET_STATUS Figure 17 Network indication reference design drawing NET_STATUS is used to indicate the working state of the module. The customer can connect this pin to the pull-up GPIO on the device tape.

  • Page 38: Ulps

    Use the following AT instruction to put the module into ultra-low power mode (for power test) AT^TRACECTRL=0, 0 AT^TRACECTRL=1, 0 AT+CSCLK=2 3.12 ADC Mode SLM336 provides a two-way 12-bit analog-digital conversion interface, and the ADC voltage range is 0-VBAT. Table 21 ADC pin description Pin Name Description...

  • Page 39: Audio Interface

    SLM336 Hardware Design Manual the module, and then the module will enter the forced download mode. In this mode, the module can be upgraded via USB interface. Table 22 USB_BOOT pin definition Pin Name Description USB_BOOT Short connect USB_BOOT and VDD_EXT before...

  • Page 40: I2C Interface

    SLM336 Hardware Design Manual frame signal synchronization PCM_SYNC Leave empty if not used data input signal PCM_DIN Leave empty if not used data output signal PCM_DOUT Leave empty if not used 3.16 I2C Interface Table 25 I2C pin definition Pin Name...

  • Page 41: Function Multiplexing Interface

    SLM336 Hardware Design Manual SPI chip selection SPI_CS Leave empty if not used SPI Main mode input SPI_DIN Leave empty if not used SPI Main mode output SPI_DOUT Leave empty if not used 3.18 Function Multiplexing Interface Table 27 Pin definition of multiplexing function...
  • Page 42 SLM336 Hardware Design Manual _sio_3 NET_STATUS gpio_13 gpio_13 spi_1_cs_ SPI_CS spi_1_cs_0 gpio_10 SPI_CLK spi_1_clk gpio_9 spi_1_clk AUX_TXD uart_2_txd gpio_21 uart_2_txd AUX_RXD uart_2_rxd gpio_20 uart_2_rxd sdmmc1_d MAIN_DTR gpio_25 gpio_25 ata_0* MAIN_CTS uart_1_cts gpio_19 uart_1_cts MAIN_RTS uart_1_rts gpio_18 uart_1_rts sdmmc1_c MAIN_DCD gpio_24...

  • Page 43: Antenna Interface

    SPI_DIN spi_1_di_1 gpio_12 spi_1_di_1 Remarks: "*" means under development. Antenna Interface SLM336 module design interface, there are two antenna, the antenna impedance 50Ω. Table 19 Definition of pin of antenna interface Pin Name Pin Number Description Remark 50Ω impedance...

  • Page 44: Rf Reference Circuit

    SLM336 Hardware Design Manual RF Reference Circuit 4.2.1 Antenna Connection Reference Design The reference circuit for antenna connection of ANT_MAIN, ANT_BT/WIFI_SCAN is shown in the figure below. In order to obtain better RF performance, the following four points should be paid attention...
  • Page 45 SLM336 Hardware Design Manual FIG. 20 Two-layer PCB microstrip line structure Complete structure of coplanar waveguide FIG. 21 Two-layer PCB coplanar waveguide structure FIG. 22 Multi-layer PCB coplanar waveguide structure (the reference ground is the third layer) In the circuit design of RF antenna interface, in order to ensure the good performance and reliability of RF signal, the following design principles are recommended: ⚫...

  • Page 46: Antenna Installation

    WIFI/BT input impedance（ohm）: 50 Type of polarization: vertical direction Cable insertion loss: < 1.5dB 4.3.2 RF output power The RF output power of SLM336 is shown in the following table. Table 30 SLM336 RF transmission power Frequency GSM850 33dBm±2dB 5dBm±5dB EGSM900 33dBm±2dB...

  • Page 47: Rf Frequency

    LTE-FDD B8 23dBm±2.7dB <-39dBm LTE-TDD B20 23dBm±2.7dB <-39dBm LTE-TDD B28 23dBm±2.7dB <-39dBm 4.3.3 RF Frequency Table 31 SLM336 module RF reception sensitivity Reception sensitivity (typical value BW) -10M Frequency 3GPP Dominant set Diversity Dominant+Diversity （ Dominant+Diversity） GSM850 -108dBm -102.4dBm EGSM900 -108dBm -102.4dBm...

  • Page 48: Ota Antenna Requirements

    SLM336 Hardware Design Manual 4.3.5 OTA Antenna Requirements Table 33 Antenna index requirements Gain Network Band VSWR Effi. (dBm Mode (dBm) Peak Avg. <-101 <-101 1800(DCS) <-101 1900(DCS) <-101 Band1 <-91 <2.5:1 >0dBi >-4dBi >40% <1.6W/Kg Band3 <-91 Band5 <-91 Band7 <-91...

  • Page 49: Electrical Characteristics

    -0.3 Ambient Temperature Range The SLM336 module is recommended to operate at -30~+75℃. It is suggested that temperature control measures should be considered at the application end under adverse environmental conditions. At the same time, the extended operating temperature range of the module is provided. When used at the extended temperature, the function is normal, and some RF indicators may deteriorate.

  • Page 50: Electrical Characteristics Of Interface Working State

    SLM336 Hardware Design Manual Electrical Characteristics of Interface Working State Logic low level; Logic high level。 Table 27 The logic level of a normal digital IO signal Signal Units -0.3 digital input 0.45 1.35 digital ouput Table 28 Electrical characteristics of power supply operating state...
  • Page 51 SLM336 Hardware Design Manual dorma Insert the unicom card, the actual network standby, use AT command to query and register the network, and record the 10-minute average current. Insert the telecom card, the actual network standby, use AT command to query and register the network, and record the average current of 10 minutes.
  • Page 52 SLM336 Hardware Design Manual Set the module to sleep state through AT instruction ； (USB is in suspended state) Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the 。 average current for 10 minutes...
  • Page 53 SLM336 Hardware Design Manual Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes. DCS CH885 The tested module was powered on, and the data network was successfully registered;...
  • Page 54 SLM336 Hardware Design Manual average current for 10 minutes. Band1 CH18300 The tested module was powered on, and the data network was successfully registered; Set the module to sleep state through AT instruction (USB is in suspended state); Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 55 SLM336 Hardware Design Manual average current for 10 minutes. Band3 CH19250 The tested module was powered on, and the data network was successfully registered; Set the module to sleep state through AT instruction (USB is in suspended state); Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 56 SLM336 Hardware Design Manual average current for 10 minutes. Band5 CH20600 The tested module was powered on, and the data network was successfully registered; Set the module to sleep state through AT instruction (USB is in suspended state); Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 57 SLM336 Hardware Design Manual average current for 10 minutes. Band8 CH21625 The tested module was powered on, and the data network was successfully registered; Set the module to sleep state through AT instruction (USB is in suspended state); Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 58 SLM336 Hardware Design Manual average current for 10 minutes. Band20 CH243000 The tested module was powered on, and the data network was successfully registered; Set the module to sleep state through AT instruction (USB is in suspended state); Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 59 SLM336 Hardware Design Manual average current for 10 minutes. Band28A CH21359 The tested module was powered on, and the data network was successfully registered; Set the module to sleep state through AT instruction (USB is in suspended state); Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 60 SLM336 Hardware Design Manual average current for 10 minutes. Band1 CH18300 The tested module was powered on, and the data network was successfully registered; Set the module to sleep state through AT instruction (USB is in suspended state); Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 61 SLM336 Hardware Design Manual average current for 10 minutes. Band3 CH19250 The tested module was powered on, and the data network was successfully registered; Set the module to sleep state through AT instruction (USB is in suspended state); Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 62 SLM336 Hardware Design Manual average current for 10 minutes. Band5 CH20525 The tested module was powered on, and the data network was successfully registered; Set the module to sleep state through AT instruction (USB is in suspended state); Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 63 SLM336 Hardware Design Manual average current for 10 minutes. Band8 CH21750 The tested module was powered on, and the data network was successfully registered; Set the module to sleep state through AT instruction (USB is in suspended state); Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 64 SLM336 Hardware Design Manual average current for 10 minutes. Band20 CH24300 The tested module was powered on, and the data network was successfully registered; Set the module to sleep state through AT instruction (USB is in suspended state); Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 65 SLM336 Hardware Design Manual average current for 10 minutes. Band28A CH27359 The tested module was powered on, and the data network was successfully registered; Set the module to sleep state through AT instruction (USB is in suspended state); Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 66 SLM336 Hardware Design Manual average current for 10 minutes. Band1 CH18300 Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes. Band1 CH18050 Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 67 SLM336 Hardware Design Manual Band5 CH20450 Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes. Band5 CH20525 Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 68 SLM336 Hardware Design Manual Band20 CH24200 Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes. Band20 CH24300 Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes.
  • Page 69 SLM336 Hardware Design Manual Band28B CH27609 Under the condition of no data transmission, the tested module maintained for 10 minutes and recorded the average current for 10 minutes. Real Keep the data connection sending 256-byte packets back networ Unicom to the server every 5 minutes...
  • Page 70 SLM336 Hardware Design Manual Band3 10dBm The tested module carries out data transmission and maintains for 5 minutes, and records the average current for 5 minutes Band3 23dBm CH19575 The tested module carries out data transmission and maintains for 5 minutes, and records the average current...
  • Page 71 SLM336 Hardware Design Manual Band5 23dBm CH20600 The tested module carries out data transmission and maintains for 5 minutes, and records the average current for 5 minutes Band7 23dBm CH21100 The tested module carries out data transmission and maintains for 5 minutes, and records the average current...
  • Page 72 SLM336 Hardware Design Manual Band20 10dBm Middle channel tested module carries data transmission and maintains for 5 minutes, and records the average current for 5 minutes Band20 23dBm Low channel tested module carries out data transmission and maintains for 5 minutes, and records the average...
  • Page 73 SLM336 Hardware Design Manual Band28 23dBm High channel tested module carries out data transmission and maintains for 5 minutes, and records the average current for 5 minutes SLM336 Hardware Design Manual 72 / 79...

  • Page 74: Mechanical Characteristics

    SLM336 Hardware Design Manual Mechanical Characteristics This section describes the mechanical dimensions of the module, all in millimeters; All dimensions not marked with tolerance, tolerance is ±0.05mm. 6.1 Module Dimension FIG. 23 Structural dimension drawing (unit: mm) SLM336 Hardware Design Manual...

  • Page 75: Recommended Package

    SLM336 Hardware Design Manual Recommended Package Figure 24 Recommended encapsulation (top view) (unit: mm) 6.3 Module Top View Figure 25Top view of the module SLM336 Hardware Design Manual 74 / 79...

  • Page 76: Module Bottom View

    SLM336 Hardware Design Manual 6.4 Module Bottom View Figure 26. Bottom view of the module SLM336 Hardware Design Manual 75 / 79...

  • Page 77: Storage And Production

    Storage and Production Storage The SLM336 is shipped in vacuum sealed bags. The storage of modules shall be subject to the following conditions: When the ambient temperature is lower than 40°C and the air humidity is less than 90%, the module can be stored in a vacuum sealed bag for 12 months;...

  • Page 78: Manufacturing Welding

    SLM336 Hardware Design Manual 7.2 Manufacturing Welding FIG. 27 Reflow temperature curve SLM336 Hardware Design Manual 77 / 79...

  • Page 79: Appendix A Reference And Term Abbreviation

    SLM336 Hardware Design Manual Appendix A Reference and Term Abbreviation Reference ⚫ SLM336 Module specifications; ⚫ SLM336 AT Commands; ⚫ SLM336 EVB user's manual ⚫ SLM336 Reference design circuit; ⚫ SLM336 Apply the business process manual. 8.2 Term Abbreviation Table 39 Term abbreviations...
  • Page 80 SLM336 Hardware Design Manual 国际移动设备标识 IMEI International Mobile Equipment Identity MEID Mobile Equipment Identifier CDMA终端的身份识别码 输入/输出 Input/Output 国际标准化组织 International Standards Organization 国际电信联盟 International Telecommunications Union 比特每秒 bits per second 发光二极管 Light Emitting Diode 机器到机器 Machine to machine 移动台发起的 Mobile Originated 移动台终止的...

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